If a Punnett square is used to visualize a three-factor cross (trihybrid cross) how many boxes would be inside of the square?
A) 3
B) 8
C) 48
D) 64
E) Can't be determined

Question

Quizplus · Accepted Answer

For a trihybrid cross, there are three different gene pairs segregating independently. Therefore, there will be 2^3 (2 to the power of 3) possible gametes for each parent. Multiplying these gametes, we get 2^3 x 2^3 = 2^6 = 64 possible offspring genotypes. Therefore, a trihybrid Punnett square will have 64 boxes inside.

If a Punnett Square Is Used to Visualize a Three-Factor